// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// ignore-pretty pretty-printing is unhygienic

#![feature(decl_macro)]

trait Tr {
    fn f(&self) -> &'static str {
        "This shouldn't happen"
    }
}

pub macro m($t:ty) {
    impl Tr for $t {
        fn f(&self) -> &'static str {
            "Run me"
        }
    }
}

struct S;
m!(S);

fn main() {
    assert_eq!(S.f(), "Run me");
}